JP6124173B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay.

  A conventional electromagnetic relay has an armature that oscillates when the electromagnet block is excited and de-excited, and a movable contact plate (movable contact holder) on which a pair of movable contacts are provided. There is known one that includes a movable contact portion that moves and a fixed contact portion that has a pair of fixed contacts to which the movable contact contacts and separates (see, for example, Patent Document 1).

JP 2010-123545 A

  However, in the above prior art, the pair of movable contacts provided on the movable contact plate (movable contact holding portion) is configured to operate integrally. Therefore, if the contact on one side (movable contact and fixed contact) is welded, the contact on the other side (movable contact and fixed contact) may not be brought into contact. Therefore, there is a risk that the reliability of the contact may be impaired.

  Then, an object of this invention is to obtain the electromagnetic relay which can improve the reliability of a contact more.

In order to achieve the above object, the first feature of the present invention is that the armature includes an armature that swings when the electromagnet block is excited or not excited, and a movable contact holding portion provided with a plurality of movable contacts. A movable contact portion that is attached to the movable armature and swings as the armature swings, and a fixed contact portion that has a fixed contact to which the movable contact contacts and separates. A first holding unit provided with a movable contact; a second holding unit spaced apart from the first holding unit and provided with a second movable contact; the first holding unit and the second holding unit; And a connecting part attached to the armature , wherein the first holding part and the second holding part are respectively connected to the connecting piece extending from the connecting part to the one side and the connecting part. An intermediate piece extending in a direction intersecting the surface of the connecting piece from the end of the piece, and the front An end piece extending in the direction opposite to the one from the end of the intermediate piece, and the end pieces of the first holding portion and the second holding portion are respectively provided with the first piece. A movable contact and the second movable contact are provided, and at least one side of the connecting piece of the first holding portion and the connecting piece of the second holding portion are separated from each other, The gist is that the holding portion is configured to be movable relative to the second holding portion.

The second feature is the pre-Symbol first aspect that a slit to separate and the connecting piece of the holding portion and said connecting piece of said second holding portion.

  The gist of the third feature is that the movable contact holding portion is made of an elastic body.

A fourth feature is that the movable contact portion is disposed so as to overlap at least the connecting portion of the movable contact holding portion, and includes a fixed portion to which a tip end portion of the connecting portion is joined, and the movable contact holding portion The gist is that a convex portion is provided on any one of the opposing surfaces where the portion and the fixed portion overlap.

The fifth feature is summarized in that the convex portion is provided at an end portion of the facing surface opposite to the tip portion side of the connecting portion.

The sixth feature is summarized in that the fixed portion is extended to a position overlapping the first holding portion and the second holding portion of the movable contact holding portion.

The seventh feature is that the convex portion is formed in an arc shape.

  According to the present invention, since the first holding part is configured to be relatively movable with respect to the second holding part, the first holding part provided with the first movable contact and the second movable contact are provided. Independent operation with each of the second holding portions is possible, and the reliability of the contacts can be further increased.

It is a front view which shows the electromagnetic relay concerning 1st Embodiment of this invention. It is a perspective view which shows the cover of the electromagnetic relay concerning 1st Embodiment of this invention. It is a perspective view which shows the state which removed the cover of the electromagnetic relay concerning 1st Embodiment of this invention. It is AA sectional drawing of FIG. FIG. 4 is a perspective view showing a state in which a part of the magnetic breaking yoke and the arc extinguishing part of FIG. 3 are removed. It is the figure which removed a part of electromagnetic relay concerning a 1st embodiment of the present invention, and is a perspective view showing a movable contact part and a fixed contact part. It is BB sectional drawing of FIG. It is the figure which showed the movable contact holding part concerning 1st Embodiment of this invention, Comprising: (a) is a perspective view, (b) is explanatory drawing which shows the independent operation | movement of a movable contact. It is the figure which showed the conventional movable contact holding part, Comprising: (a) is a perspective view, (b) is explanatory drawing which shows integral operation | movement of a movable contact. It is the figure which showed the 1st modification of the movable contact holding part concerning 1st Embodiment of this invention. It is the figure which showed the 2nd modification of the movable contact holding part concerning 1st Embodiment of this invention. It is the figure which showed the 3rd modification of the movable contact holding part concerning 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the electromagnetic relay concerning 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the electromagnetic relay concerning 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the electromagnetic relay concerning 4th Embodiment of this invention. It is a longitudinal cross-sectional view of the electromagnetic relay concerning 5th Embodiment of this invention. It is a longitudinal cross-sectional view of the electromagnetic relay concerning 6th Embodiment of this invention. It is the figure which showed the movable contact holding part of the electromagnetic relay concerning 7th Embodiment of this invention, Comprising: (a) is a side view, (b) is a front view. It is the figure which showed operation | movement of the movable contact holding | maintenance part shown in FIG. 18, Comprising: (a) is the figure which showed operation | movement at the time of ON which makes a movable contact and a fixed contact contact, (b) is a movable contact, a fixed contact, It is the figure which showed the operation | movement at the time of OFF which spaces apart. It is the figure which showed the movable contact holding part of the electromagnetic relay concerning 8th Embodiment of this invention, Comprising: (a) is a side view, (b) is a front view. It is the figure which showed the movable contact holding part of the electromagnetic relay concerning 9th Embodiment of this invention, Comprising: (a) is a side view, (b) is a front view.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the side on which the electromagnet block of the electromagnetic relay is formed is defined as the front side in the front-rear direction, and the side on which the movable contact part and the fixed contact part are provided is defined as the rear side in the front-rear direction. The direction in which the case is attached is defined as the up-down direction. And the direction orthogonal to the front-back direction and the up-down direction is defined as the width direction.

  Moreover, the same component is contained in the following several embodiment. Therefore, in the following, common reference numerals are given to those similar components, and redundant description is omitted.

[First Embodiment]
FIGS. 1-8 is the figure which showed 1st Embodiment of the electromagnetic relay concerning this invention. As shown in FIG. 7, the electromagnetic relay 1 of this embodiment includes a case 2, a base 30, an electromagnet block 10, an armature 16, a movable contact portion 21, and a fixed contact portion 22.

  The base 30 is formed of a synthetic resin, which is an insulating material, and includes a substantially U-shaped insulating wall 31 in a plan view as shown in FIG. An electromagnet housing portion 34 for housing the electromagnet block 10 is formed on the front side of the insulating wall 31 (left side in FIG. 7). On the other hand, a wall portion 32 is provided on the rear surface side (the right side in FIG. 7), and a contact housing portion 33 surrounded by the insulating wall 31 and the wall portion 32 is formed. In the contact accommodating portion 33, the movable contact portion 21 and the fixed contact portion 22 are disposed. Moreover, the insulating wall 31 has the effect | action which interrupts | blocks the electromagnet block 10 and a contact part (the movable contact part 21 and the fixed contact part 22).

  The electromagnet block 10 includes a yoke 14, a coil block 11, and an iron core 15.

  The yoke 14 is formed to be bent in a substantially L shape, and the coil block 11 formed by winding the coil 12 around the coil bobbin 13 is placed on the bottom plate 14 a of the yoke 14. The coil 12 is connected to a coil terminal 19 that is implanted in the base 30. The iron core 15 includes a trunk portion 15b and a bowl-shaped suction piece 15a arranged at the head of the trunk portion 15b. In the state where the trunk portion 15b is passed through the through hole 13a of the coil bobbin 13, the yoke 15 14 is fixed to the mounting hole 14b of the bottom plate 14a.

  The armature 16 includes a magnetic pole piece 16a and a hanging piece 16b, and the magnetic pole piece 16a and the hanging piece 16b are formed in an L shape. In the present embodiment, the armature 16 is arranged in an inverted L shape so that the magnetic pole piece 16a extends in the upper part and substantially in the horizontal direction and the hanging piece 16b extends in the lower part and in the substantially vertical direction when viewed from the side. Has been. And the clamping piece 14c projected from the upper end both sides of the yoke 14 engages with the notch recess 16c formed in the both sides of the magnetic pole piece 16a, and the armature 16 is supported so that rocking | fluctuation is possible. The magnetic pole piece 16 a of the armature 16 is disposed at a position facing the attracting piece 15 a of the iron core 15.

  The hinge spring 18 is interposed between the armature 16 and the yoke 14, and a spring piece 18 a that presses the upper part of an insulating part 17 described later is formed on the upper part. When the coil 12 is not energized (when the electromagnet block 10 is not energized), the magnetic pole piece 16a of the armature 16 is separated from the attracting piece 15a of the iron core 15 by the pressing force of the spring piece 18a. Retained. On the other hand, when the coil 12 is energized (when the electromagnet block 10 is excited), the magnetic force of the attracting piece 15a of the iron core 15 overcomes the pressing force of the spring piece 18a, and the magnetic pole piece 16a of the armature 16 attracts the iron core 15. Contact piece 15a.

  The movable contact portion 21 that swings according to the operation (swing) of the armature 16 is attached to the hanging piece 16 b of the armature 16 via the insulating portion 17.

  The movable contact portion 21 is provided with a movable contact 21a. When the movable contact 21a contacts and separates from the fixed contact 22a provided on the fixed contact portion 22 according to the swing of the movable contact portion 21, contact switching is performed. Is done.

  In the present embodiment, the movable contact portion 21 includes a fixed piece 23 attached to the hanging piece 16b of the armature 16 via the insulating portion 17, and one end side connected to the fixed piece 23, and a pair (multiple pieces) on the other end side. ) Movable contact 21a provided with a movable spring (movable contact holding portion) 24.

  The movable spring 24 of the present embodiment includes a connecting piece 24a extending in the vertical direction and having an attachment hole 24d formed at the upper end, a bottom plate 24b extending horizontally and rearward from the lower end of the connecting piece 24a, and a bottom plate And a rising piece 24c that rises upward from the rear end of 24b.

  The movable contact 21a is fixed to the rising piece 24c so as to face rearward. In the present embodiment, the bottom plate 24b has a bifurcated shape, and a rising piece 24c is formed at the rear end of each branched portion. With such a movable contact portion 21, the movable contact 21a protrudes rearward from the insulating portion 17, and the movable contact 21a and the insulating portion 17 do not overlap in plan view.

  As shown in FIG. 6, two sets of the fixed piece 23 and the movable spring 24 are provided. That is, the electromagnetic relay 1 of this embodiment is provided with four movable contacts 21a.

  The fixed contact portion 22 is composed of four fixed contact plates 26 to which the fixed contacts 22 a are fixed one by one, and is attached to the contact accommodating portion 33 of the base 30.

  Specifically, as shown in FIG. 7, the fixed contact plate 26 is bent in a crank shape, and the fixed contact 22 a is fixed to the upper end of the fixed contact plate 26. The fixed contact plate 26 does not necessarily need to be bent and formed in a crank shape, and can have various shapes. For example, it is possible to use a fixed contact plate that is not bent and is straight when viewed from the side.

  The fixed contact plate 26 is attached to the contact accommodating portion 33 of the base 30 by inserting the fixed contact plate 26 into the contact accommodating portion 33 from below with the fixed contact 22 a positioned on the upper side and the rear side. At this time, the four fixed contact plates 26 are attached so that the four fixed contacts 22a face the four movable contacts 21a, respectively. When the coil 12 is not energized (when the electromagnet block 10 is de-energized), the four fixed contacts 22a and the four movable contacts 21a are connected to the rear surface side of the contact housing portion 33 of the base 30 (the right side in FIG. 7). ) Separated from each other. On the other hand, when the movable contact portion 21 swings when the coil 12 is energized (when the electromagnet block 10 is excited), the four movable contacts 21a approach the four fixed contacts 22a that face each other. It comes to touch.

  Further, in the present embodiment, the electromagnetic relay 1 is formed with an arc extension space S that extends an arc generated when the movable contact 21a and the fixed contact 22a come in contact with and away from each other.

  Specifically, as shown in FIG. 2, a wall 2 a and a side wall 2 b are provided inside the case 2. Then, when the base 30 to which each member is attached is covered with the case 2, the pair of corresponding movable contact 21a and fixed contact 22a (contacts that come in contact with each other) are surrounded by the wall 2a and the side wall 2b. . In the present embodiment, the space partitioned by the wall portion 2a and the side wall 2b is an arc extension space S. At this time, the fixed contact 22a and the insulating portion 17 are defined by the wall portion 2a.

  Further, the electromagnetic relay 1 is provided with a permanent magnet 50 as a magnetic field generating means for guiding an arc generated when the movable contact 21a and the fixed contact 22a come into contact with or separated from each other to the arc extension space S. As shown in FIGS. 4 and 5, the permanent magnet 50 is provided so as to extend vertically on one end side in the width direction of the paired movable contact 21 a and fixed contact 22 a. An arc generated when the movable contact 21 a and the fixed contact 22 a are brought into contact with each other is stretched above the arc extension space S by the magnetic action of the permanent magnet 50.

  Furthermore, an arc extinguishing part 40 is provided around the fixed contact part 22 in the arc extension space S so that the fixed contact 22a is accommodated. In the present embodiment, the arc extinguishing portion 40 has a box shape opened downward, and is inserted into the arc extension space S so as to cover the fixed contact 22a. A small opening 42 a is formed in the top wall 42 of the arc extinguishing part 40 so that the arc can easily enter the arc extension space S.

  Furthermore, the arc extinguishing part 40 is formed of an insulating material capable of generating arc extinguishing gas when the arc comes into contact. As an insulating material composing the arc extinguishing part 40, unsaturated polyester or a chain compound obtained by adding a metal hydroxide or a hydrate is preferable.

  The arc extinguishing part 40 and the permanent magnet 50 that are accommodated so as to cover the contacts (the movable contact 21a and the fixed contact 22a that form a pair) are covered with the magnetic breaking yoke 60 at both the upper side and the width direction. The magnetic interrupting yoke 60 is for suppressing the permanent magnet 50 acting on one contact from acting on another contact.

  A rising piece 24c can be inserted below the wall 2a provided on the movable spring 24 side of the walls (wall 2a, side wall 2b, and side wall of the case 2) that define the arc extension space S. An opening is formed. In the present embodiment, an opening 2c and an opening 41a are formed on the lower side of the wall 2a and the lower side of the front wall 41 of the arc extinguishing part 40, respectively, so that the rising piece 24c on which the movable contact 21a is formed. Can be inserted into the arc extension space S.

  Here, in the present embodiment, the movable spring (movable contact holding portion) 24 provided with the pair (plural) of movable contacts 21a and 21a described above can be devised to ensure independent operation of each of the movable contacts 21a and 21a. Has been given.

  Specifically, as shown in FIG. 8A, in this embodiment, a slit 28 is formed between the pair of movable contacts 21a, 21a of the movable spring 24. In this embodiment, the slit 28 extends from the bottom plate 24b of the movable spring 24 to a substantially intermediate position in the vertical direction of the connecting piece 24a, and branches the connecting piece 24a, the bottom plate 24b, and the rising piece 24c of the movable spring 24 into a bifurcated shape. doing. With such a configuration, the movable spring 24 is provided with the first holding portion 24A provided with the first movable contact 21a, and the second holding portion 24A separated from the first holding portion 24A and provided with the second movable contact 21a. The holding portion 24B is formed. The movable spring 24 is provided with the first and second movable contacts 21a and 21a described above at one end of the movable spring 24, while the first holding portion 24A and the second holding contact are provided at the other end. A connecting portion 24C that connects the holding portion 24B is provided.

  As described above, in the present embodiment, the first holding portion 24A is made to be the second holding portion by forming the slit 28 for separating the first holding portion 24A and the second holding portion 24B in the movable spring 24. It is configured to be movable relative to 24B. Accordingly, the first holding portion 24A and the second holding portion 24B of the movable spring 24 can operate independently from each other from the cut portion of the slit 28.

  In the present embodiment, the movable spring 24 is made of chrome copper. Chrome copper has springiness (elasticity), and the movable spring 24 itself promotes independent operation (relative movement) of the first movable contact 21a and the second movable contact 21a. ing.

  Furthermore, in this embodiment, the semicircular notch 29 is provided on the base end side (the connecting piece 24a side) of the bottom plate 24b in the movable spring 24. In FIG. 8A, the cutout portion 29 is shown only on the first holding portion 24A side of the movable spring 24, but actually, it is also provided on the second holding portion 24B side. Such a notch 29 makes it easy to operate the rising pieces 24c of the first and second holding parts 24A and 24B, and provides a wiping effect between the contacts (the movable contact 21a and the fixed contact 22a to be paired). I try to get it.

  Next, the contact operation of the electromagnetic relay 1 having such a configuration will be described.

  In this electromagnetic relay 1, when the electromagnet block 10 is in a non-excited state, the spring piece 18 a of the hinge spring 18 presses the upper surface of the insulating portion 17, so that the armature 16 rotates in the clockwise direction in FIG. 7. doing. Therefore, the magnetic pole piece 16 a of the armature 16 is in a state separated from the attracting piece 15 a of the iron core 15. In this state, as shown in FIG. 7, the movable contact 21a and the fixed contact 22a are also separated.

  When the coil 12 is energized to excite the electromagnet block 10, a magnetic force that attracts the magnetic pole piece 16 a of the armature 16 to the attracting piece 15 a of the iron core 15 is generated through the yoke 14, the iron core 15, and the armature 16. At this time, the magnetic pole piece 16a of the armature 16 is attracted to the suction piece 15a of the iron core 15 against the spring force (pressing force) of the hinge spring 18, and the armature 16 rotates counterclockwise in FIG. To do. Accordingly, the movable spring 24 also moves in the counterclockwise direction, and the four movable contacts 21a come into contact with the opposing fixed contacts 22a.

  When the energization of the coil 12 is stopped, the reverse operation is performed, and the movable contact 21a and the fixed contact 22a are separated.

  Thus, by switching on / off of energization to the coil 12, the movable contact 21a and the fixed contact 22a are brought into contact with and separated from each other, and an arc is generated when the movable contact 21a and the fixed contact 22a are brought into contact with and separated from each other. There is a case.

  When such an arc occurs, the arc is guided to the arc extension space S by the permanent magnet 50. That is, the arc generated when the movable contact 21a and the fixed contact 22a are brought into contact with or separated from each other is extended to a space (arc extension space S) in the arc extinguishing unit 40. At this time, the arc travels and extends so as to lick the inner surface of the arc extinguishing unit 40. That is, the arc extends while contacting the inner surface of the arc extinguishing unit 40. For this reason, arc extinguishing gas is generated from the arc extinguishing unit 40, and the arc is extinguished by the gas.

  On the other hand, in the present embodiment, the arc interruption performance can be improved by providing the arc extension space S described above, but there is a possibility that the movable contact 21a and the fixed contact 22a may be welded by the arc. . In particular, when the movable contact 21a on one side of the pair of movable contacts 21a, 21a provided on the movable spring 24 is welded, conventionally, the movable contact 21a on the other side is brought into contact with the fixed contact 22a opposite to the movable contact 21a. There was a risk that it would be impossible. However, this embodiment can solve this problem.

  That is, as in the conventional example shown in FIG. 9A, the movable contact plate 25 having no elasticity is attached to the movable spring 24 as a movable contact holding portion. In such a configuration, when the movable contact 21a on one side is welded to the fixed contact 22a opposite to the movable contact 21a, the spring force of the hinge spring 18 is input to the movable contact plate 25 by stopping the energization of the coil 12, and FIG. As shown in (b), the movable contact plate 25 may be twisted and deformed. In this state, even if the coil 12 is energized again and the electromagnet block 10 is excited, the movable contact plate 25 is not elastic, so that the movable contact plate 25 is slid while maintaining its deformed state. (A pair of movable contacts 21a and 21a operate integrally). Accordingly, the movable contact 21a on one side and the fixed contact 22a can be brought into contact again, but the movable contact 21a on the other side and the fixed contact 22a are separated from each other even when energized. The contact cannot be contacted again.

  On the other hand, in the present embodiment, as shown in FIG. 8A, the movable spring 24 (movable contact holding portion) is provided with a slit 28, and the movable spring 24 is formed of an elastic body so that the first holding portion. 24A is configured to be movable relative to the second holding portion 24B. Therefore, even if the movable spring 24 is twisted and deformed, the first holding portion 24A and the second holding portion provided with a pair of movable contacts (first movable contact and second movable contact) 21a, 21a. An independent operation can be performed with each of the units 24B. Therefore, the movable contact (first movable contact) 21a of the first holding portion 24A is separated from the fixed contact 22a opposed thereto by torsional deformation, but from this state as shown in FIG. The first holding portion 24A can be relatively moved and pushed in by energization. Therefore, the movable contact (first movable contact) 21a of the first holding portion 24A can be brought into contact again with the fixed contact 22a opposed to the movable contact (first movable contact) 21a, and the conventional problem can be solved.

  As described above, in the present embodiment, the first holding portion is formed by forming the first holding portion 24A, the second holding portion 24B, and the connecting portion 24C in the movable spring (movable contact holding portion) 24. 24A is configured to be movable relative to the second holding portion 24B. Therefore, the first holding part 24A provided with the first movable contact 21a and the second holding part 24B provided with the second movable contact 21a can be operated independently, and the reliability of the contact is further improved. Can be increased.

  In this embodiment, the movable spring (movable contact holding portion) 24 is formed with a slit 28 that separates the first holding portion 24A and the second holding portion 24B. Therefore, the first holding unit 24A and the second holding unit 24B can be relatively moved relative to each other, and the reliability of independent operation can be increased.

  Furthermore, in the present embodiment, since the movable spring (movable contact holding portion) 24 is made of an elastic body, the movable spring 24 can have springiness (elasticity), and the first holding portion 24A and the second holding portion 24 The independent operation (relative movement) of the holding portion 24B can be promoted. Further, when the movable spring 24 as the movable contact holding portion is formed of an elastic body, there is an advantage that a wiping effect can be easily obtained. The wiping effect refers to an effect that the movable contact 21a slips after the contacts (a pair of the movable contact 21a and the fixed contact 22a) come into contact with each other and scrapes impurities generated on the surface of the fixed contact 22a. .

  In particular, in this embodiment, since the notch 29 is provided in the bottom plate 24b of the movable spring 24 made of an elastic body, the rising piece 24c provided with the movable contact 21a can be easily operated, and the wiping effect is more reliably ensured. Can get to.

  In the present embodiment, the first and second movable contacts 21 a and 21 a are provided at one end of the movable spring (movable contact holding portion) 24, and the connecting portion 24 C is provided in addition to the movable spring (movable contact holding portion) 24. It is provided at the end. Therefore, for example, the first holding portion 24A and the second holding portion 24B can be branched longer than the configuration in which the connecting portion 24C is provided in the intermediate portion of the movable spring 24, and the first holding portion 24A The second holding portion 24B can be easily moved relative to the second holding portion 24B.

  Next, with reference to FIGS. 10-12, the modification of the movable contact holding part concerning 1st Embodiment is demonstrated.

  FIG. 10 is a view showing a first modified example of the movable spring 24A as the movable contact holding portion, and this modified example is mainly different from the first embodiment in that the connecting portion 24C of the movable spring 24 is provided. This is because the reduced diameter portion is abolished.

  Even in the present modification having the above-described configuration, the same operations and effects as those of the first embodiment can be obtained.

  In addition, when the connecting piece 24a is formed in a rectangular shape as in this modification, the spring constant becomes larger than that of the movable spring 24 provided with the reduced diameter portion of the first embodiment. Easy to do.

  FIG. 11 is a view showing a second modification of the movable spring 24B as the movable contact holding portion, and this modification is mainly different from the first modification in that an arc-shaped hole is formed at the slit 28. The portion 28a is provided.

  Even in this modified example having the above-described configuration, the same operations and effects as those of the first embodiment and the first modified example can be obtained.

  FIG. 12 is a diagram showing a third modification of the movable contact holding portion. This modification is mainly different from the first embodiment in that the movable contact plate 25 as a movable contact holding portion is provided on the movable spring 24. It is in having attached.

  In this modification, a movable contact plate 25 provided with a pair of movable contacts 21a and 21a is attached to the movable spring 24 as in the conventional example, but a slit 28 is provided between the movable spring 24 and the movable contact plate 25. Forming.

  That is, the movable spring 24 includes a connecting piece 24a branched through a slit 28, and the movable contact plate 25 includes a pair of connecting plates 25a, a bottom plate 25b, and a rising piece 25c attached to the branched connecting piece 24a. Yes.

  Even in this modified example having the above-described configuration, the same operations and effects as those of the first embodiment and the first and second modified examples can be obtained.

  In the case of this modification, the number of parts increases by the amount of the movable contact plate 25. In other words, the first embodiment and the first and second modifications in which the movable contact holding part is configured by only the movable spring 24 have an advantage that the number of parts can be reduced.

[Second Embodiment]
The electromagnetic relay 1 </ b> A according to the present embodiment has substantially the same configuration as the electromagnetic relay 1 of the first embodiment.

  That is, as shown in FIG. 13, the electromagnetic relay 1A of the present embodiment includes a case 2, a base 30, an electromagnet block 10, an armature 16, a movable contact portion 21, a fixed contact portion 22, an arc extension space S, and a magnetic field generating means. The permanent magnet 50 is provided.

  Here, the electromagnetic relay 1A of the present embodiment is mainly different from the electromagnetic relay 1 of the first embodiment in that the arc extinguishing unit 40 is not provided in the arc extension space S.

  Even in the present embodiment configured as described above, the same operations and effects as those of the first embodiment can be obtained. That is, the arc length of the arc generated when the movable contact 21a and the fixed contact 22a come in contact with each other can be extended by the permanent magnet 50, and the arc extinguishing performance (arc interruption performance) can be further enhanced.

  Further, even if one side (for example, the second movable contact 21a) of the movable contacts 21a provided on the movable contact plate 25 (movable contact holding portion) is welded by the arc, the movable contact plate 25 is attached to the movable contact plate 25. Is formed with a slit 28. Therefore, the first holding portion 24A and the second holding portion 24B provided with the pair of movable contacts (first movable contact and second movable contact) 21a, 21a can be operated independently, respectively. The reliability of the can be further increased.

  In the present embodiment, the movable contact holding portion (a configuration in which the movable contact plate 25 is attached to the movable spring 24) according to the third modification is applied, but the first embodiment and the first and second modifications are applied. Of course, such a movable contact holding portion (movable springs 24, 24A, 24B) may be applied.

  Further, in the electromagnetic relay 1A shown in FIG. 13, when the arc contacts the wall 2a, an insulating material that can generate arc extinguishing gas (the same as the arc extinguishing unit 40 shown in the first embodiment). The wall 2a may also serve as an arc extinguishing part. Moreover, you may form the case 2 whole with the same material as the arc extinguishing part 40 shown in the said 1st Embodiment.

[Third Embodiment]
The electromagnetic relay 1B according to the present embodiment has substantially the same configuration as the electromagnetic relay 1A in which the arc extinguishing unit 40 is not provided in the arc extension space S of the second embodiment.

  Here, the electromagnetic relay 1B of the present embodiment is mainly different from the electromagnetic relay 1A of the second embodiment in that a separation wall 70 for dividing the arc extension space S is provided as shown in FIG. is there.

  Specifically, even in the present embodiment, the space defined by the wall 2 a and the side wall 2 b formed inside the case 2 is an arc extension space S. Each partitioned arc extension space S is provided with a pair of corresponding movable contacts 21a and fixed contacts 22a (contacts that are separated from each other), and a separation wall 70 is provided for each arc extension space S. Yes.

  In this embodiment, the separation wall 70 is provided so as to protrude from the upper wall portion 2d of the case 2 toward the fixed contact 22a side, and divides the arc extension space S vertically into two along the extension direction of the arc A. ing.

  In this embodiment, one separation wall 70 is provided for each arc extension space S and the arc extension space S is divided into two parts. However, a plurality of separation walls 70 are provided for each arc extension space S, and arc extension is performed. The space S may be divided into three or more.

  Also according to the present embodiment described above, the same operations and effects as the first and second embodiments can be obtained.

  In the present embodiment, a separation wall 70 that divides the arc extension space S is provided. Therefore, the length of the arc A can be made longer than that in the first and second embodiments, and the arc extinguishing performance (arc cut-off performance) can be further increased as much as the separation wall 70 can be made to wrap around. be able to.

  Further, the improvement of the arc extinguishing performance (arc interruption performance) in this way increases the voltage generated between the two contacts 21a and 22a, which is an interruption voltage that can be interrupted between the movable contact 21a and the fixed contact 22a. There is an advantage that

  Furthermore, in the present embodiment, a space partitioned by the wall 2a and the side wall 2b formed inside the case 2 is defined as an arc extension space S, and a separation wall 70 is provided in the arc extension space S. Therefore, there is also an advantage that the arc A length can be increased while the arc extension space S has the same arc extinguishing space size as in the first and second embodiments. Therefore, it leads to size reduction of the electromagnetic relay 1B.

[Fourth Embodiment]
The electromagnetic relay 1C according to the present embodiment has substantially the same configuration as the electromagnetic relay 1B in which the separation wall 70 that divides the arc extension space S of the third embodiment is provided.

  Here, the electromagnetic relay 1 </ b> C of the present embodiment is mainly different from the electromagnetic relay 1 </ b> B of the third embodiment, as shown in FIG. 15, as shown in FIG. 15, an uneven portion 73 is provided on the wall surface facing the arc extension space S. There is.

  Specifically, even in the present embodiment, the space defined by the wall 2 a and the side wall 2 b formed inside the case 2 is an arc extension space S. Each partitioned arc extension space S is provided with a pair of corresponding movable contact 21a and fixed contact 22a (contacts that are in contact with and away from each other). 73.

  In this embodiment, the uneven portion 73 is formed on the inner surface of the upper wall portion 2d of the case 2 as a wall surface facing the arc extension space S. In this way, the concave and convex portions 73 of the concave and convex portions 73 are formed along the extending direction of the arc A by providing the concave and convex portions 73 on the left and right sides of the upper wall portion 2d of the case 2 with the separation wall 70 interposed therebetween. I have to.

  Also according to this embodiment described above, the same operations and effects as those of the first to third embodiments can be obtained.

  In the present embodiment, the uneven portion 73 is provided on the wall surface facing the arc extension space S. For this reason, the length of the arc A can be made longer than that in the third embodiment, and the arc extinguishing performance (arc interruption performance) can be further increased as much as the concave and convex portion 73 can be wound around. . Further, the cut-off voltage can be further increased with respect to the third embodiment.

  Furthermore, in this embodiment, since the uneven portion 73 is formed along the extending direction of the arc A, the arc A can be surely entered by the uneven portion 73, and the arc A length can be reliably increased. .

  In this embodiment, the concavo-convex portion 73, which is a characteristic portion, is applied to the third embodiment in which the separation wall 70 is provided. However, in the first and second embodiments in which the separation wall 70 is not provided. Is applicable.

[Fifth Embodiment]
The electromagnetic relay 1D according to the present embodiment has substantially the same configuration as the electromagnetic relay 1A in which the arc extinguishing unit 40 is not provided in the arc extension space S of the second embodiment.

  Here, the electromagnetic relay 1D of the present embodiment is mainly different from the electromagnetic relay 1A of the second embodiment, as shown in FIG. 16, provided with a separation wall 70A that divides the arc extension spaces S1 and S2. There is.

  Specifically, in the present embodiment, the opening 2c formed on the lower side of the wall 2a is wider on the upper side than the second embodiment. Then, the wall portion 2a is caused to function as the separation wall 70A, the space on the fixed contact 22a side (right side in FIG. 16) from the separation wall 70A is defined as the first arc extension space S1, and from the separation wall 70A to the insulating portion 17 side (FIG. 16). The left side) space is a second arc extension space S2. Therefore, in the present embodiment, a plurality of first arc extension spaces S1 are formed corresponding to the pair of corresponding movable contact 21a and fixed contact 22a, whereas the second arc extension space S2 is the case 2 Only one is formed inside and shared.

  Also according to this embodiment described above, the same operations and effects as those of the first to fourth embodiments can be obtained.

  In the present embodiment, a separation wall 70A that divides the arc extension spaces S1 and S2 is provided. Therefore, the length of the arc A can be made longer than that in the first to fourth embodiments, and the arc extinguishing performance (arc cut-off performance) can be further increased as much as the separation wall 70A can be moved around. be able to. Further, the cut-off voltage can be further increased with respect to the first to fourth embodiments.

  In this embodiment, the arc extension spaces S1 and S2 are divided into two parts by the separation wall 70A. For example, the arc extension is performed by adding the separation wall 70 of the third embodiment to the first arc extension space S1. The space may be divided into three or more.

[Sixth Embodiment]
The electromagnetic relay 1E according to the present embodiment has substantially the same configuration as the electromagnetic relay 1D provided with the separation wall 70A that divides the arc extension spaces S1 and S2 of the fifth embodiment.

  Here, the electromagnetic relay 1E according to the present embodiment is mainly different from the electromagnetic relay 1D according to the fifth embodiment in that an uneven portion 73 is provided on the wall surface facing the arc extension spaces S1 and S2, as shown in FIG. It is in providing.

  Specifically, even in this embodiment, the opening 2c formed on the lower side of the wall 2a is widened on the upper side, and the wall 2a functions as the separation wall 70A. The space on the fixed contact 22a side from the separation wall 70A is the first arc extension space S1, and the space on the insulating portion 17 side from the separation wall 70A is the second arc extension space S2, and these first and second arcs are used. Concave and convex portions 73 are provided in each of the extension spaces S1 and S2.

  In this embodiment, the concavo-convex portion 73 is formed on the inner surface of the upper wall portion 2d of the case 2 as a wall surface facing the arc extension spaces S1 and S2 and on the surface of the central wall 35 of the base 30 on the movable spring 24 side. ing. The pair of concavo-convex portions 73 are formed so that the concave surface and the convex surface of the concavo-convex portion 73 are formed along the extending direction of the arc A.

  Also according to this embodiment described above, the same operations and effects as those of the first to fifth embodiments can be obtained.

  Moreover, in this embodiment, the uneven | corrugated | grooved part 73 is provided in the wall surface facing arc extension space S1, S2. For this reason, the length of the arc A can be made longer than that of the fifth embodiment, and the arc extinguishing performance (arc interruption performance) can be further increased as much as the concave and convex portion 73 can be wound around. . Further, the cut-off voltage can be further increased with respect to the fifth embodiment.

  Furthermore, in this embodiment, since the uneven portion 73 is formed along the extending direction of the arc A, the arc A can be surely entered by the uneven portions 73, 73, and the arc A length is reliably increased. Can do.

[Seventh Embodiment]
The electromagnetic relay 1 according to the present embodiment has substantially the same configuration as the electromagnetic relay 1 of the first embodiment.

  That is, the electromagnetic relay 1 of this embodiment includes a case 2, a base 30, an electromagnet block 10, an armature 16, a movable contact portion 21, a fixed contact portion 22, an arc extension space S, and a permanent magnet 50 as a magnetic field generating means. ing.

  Then, as shown in FIGS. 7 and 18A and 18B, the movable contact portion 21 is disposed so as to overlap at least the connecting portion 24C of the movable spring (movable contact holding portion) 24, and the connecting portion 24C. The plate-shaped fixing piece (fixing part) 23 to which the upper end part (tip part) 24f of this is joined is provided.

  As described above, a pair of mounting holes 24d (see FIG. 8A) is formed in the upper end 24f of the movable spring 24, and the mounting holes 24d and mounting holes (not shown) of the fixed piece 23 are not shown. ) Are rivet-bonded by the fixing member 27, for example. The fixed piece 23 is attached to the hanging piece 16b of the armature 16 via the insulating portion 17, and accordingly, the fixed piece 23 is movable with the fixed piece 23 of the movable contact portion 21 as the armature 16 swings. The spring 24 swings integrally.

  Here, the electromagnetic relay 1 of the present embodiment is mainly different from the electromagnetic relay 1 of the first embodiment in that one of the opposing surfaces 24g and 23a where the movable spring 24 and the fixed piece 23 overlap is convex. The part 20 is provided.

  Specifically, as shown in FIGS. 18A and 18B, in the present embodiment, the convex portion 20 is provided on the facing surface 23 a of the fixed piece 23, and the movable spring 24 side extends from the facing surface 23 a. It protrudes in an arc shape. At this time, it is preferable that the convex portion 20 is provided at an end portion 23b opposite to the upper end portion (tip portion) 24f side of the connecting portion 24C in the pair of opposing surfaces 24g and 23a.

  19A and 19B are views showing the operation of the movable spring 24. FIG. 19A is a view showing the operation when the movable contact 21a and the fixed contact 22a are brought into contact with each other. FIG. It is the figure which showed the operation | movement at the time of OFF which spaces apart the contact 22a.

  When the coil 12 is energized and the magnetic pole piece 16a of the armature 16 is attracted to the attracting piece 15a of the iron core 15, the movable spring 24 moves in the direction of arrow a in FIG. The movable contact 21a and the fixed contact 22a come into contact with each other and turn on. On the other hand, when energization of the coil 12 is stopped, the reverse operation is performed, and the movable spring 24 rotates in the direction of the arrow b in FIG. 19B in conjunction with the armature 16 to be fixed to the movable contact 21a. The contact 22a is separated from the contact 22a to be in an OFF state and returns to the state of FIG.

  At this time, in this embodiment, the convex part 20 is provided in any one of the opposing surfaces 24g and 23a with which the movable spring 24 and the fixed piece 23 overlap. Therefore, as described above, even when the movable contact 21a and the fixed contact 22a are welded by the arc, the convex portion 20 peels the movable contact 21a from the fixed contact 22a in the direction of the arrow b (that is, the movable contact 21a is peeled off from the fixed contact 22a). Direction). Accordingly, by causing the convex portion 20 to act on the movable spring 24 in the original state indicated by the two-dot chain line, the movable contact 21a can be easily peeled off from the fixed contact 22a, and the reliability of the contact is further improved. Can be increased.

  Also according to this embodiment described above, the same operations and effects as those of the first to sixth embodiments can be obtained.

  In the present embodiment, the movable contact portion 21 is disposed so as to overlap at least the connecting portion 24C of the movable spring (movable contact holding portion) 24, and the upper end portion (tip end portion) 24f of the connecting portion 24C is joined. A fixed piece (fixed portion) 23 is provided. And the convex part 20 is provided in any one of the opposing surfaces 24g and 23a with which the movable spring (movable contact holding | maintenance part) 24 and the fixed piece (fixed part) 23 overlap. Therefore, when the contact where the movable contact 21a is separated from the fixed contact 22a is OFF, as shown in FIG. 19B, the convex portion 20 causes the movable spring 24 to move in the direction of arrow b (the direction in which the movable contact 21a is peeled off from the fixed contact 22a). ) Force can be applied. Therefore, even when the movable contact 21a and the fixed contact 22a are welded by the arc, the movable contact 21a can be easily peeled off from the fixed contact 22a, and the reliability of the contact can be further improved. .

  Furthermore, in this embodiment, the convex part 20 is provided in the edge part 23b on the opposite side to the upper end part (tip part) 24f side of the connection part 24C in a pair of opposing surface 24g, 23a. For this reason, the portion where the force is applied to the movable spring 24 by the convex portion 20 can be brought closer to the contact side, so that the peeling force can be increased to make it easier to peel the movable contact 21a from the fixed contact 22a. .

  Furthermore, in this embodiment, the convex part 20 provided in the opposing surface 23a of the fixed piece 23 is formed in circular arc shape. Therefore, at the time of contact between the convex portion 20 and the opposed surface 24g of the movable spring 24, damage such as scraping on the convex portion 20 or the opposed opposed surface 24g side can be suppressed, and an effect can be achieved on the tip side protruding in an arc shape. Thus, a force can be applied in the peeling direction.

[Eighth Embodiment]
The electromagnetic relay 1 according to the present embodiment has substantially the same configuration as the electromagnetic relay 1 of the seventh embodiment.

  Here, the electromagnetic relay 1 of the present embodiment is mainly different from the electromagnetic relay 1 of the seventh embodiment in that the fixed piece (fixed portion) 23A is the first holding of the movable spring (movable contact holding portion) 24. That is, it extends to a position overlapping with the portion 24A and the second holding portion 24B.

  Specifically, as shown in FIGS. 20A and 20B, even in this embodiment, the convex portion 20 is provided on the facing surface 23a of the fixed piece 23, and is movable from the facing surface 23a. It projects in an arc shape toward the spring 24 side. Moreover, the convex part 20 is provided in the edge part 23b on the opposite side to the upper end part (tip part) 24f side of the connection part 24C in a pair of opposing surface 24g, 23a.

  The fixed piece 23A is a position where the first holding part 24A and the second holding part 24B branched in a forked manner from the connecting part 24C, and in the present embodiment, the fixed piece 23A has a bottom plate 24b of the movable spring 24. It extends to the vicinity.

  Also according to this embodiment described above, the same operations and effects as those of the first to seventh embodiments can be obtained. In other words, when the contact at which the movable contact 21a is separated from the fixed contact 22a is OFF, a force can be applied to the movable spring 24 by the convex portion 20 in the direction of peeling the movable contact 21a from the fixed contact 22a. Therefore, even when the movable contact 21a and the fixed contact 22a are welded by the arc, the movable contact 21a can be easily peeled off from the fixed contact 22a, and the reliability of the contact can be further improved.

  In the present embodiment, the fixed piece (fixed part) 23A is extended to a position where it overlaps with the first holding part 24A and the second holding part 24B of the movable spring (movable contact holding part) 24. For this reason, the portion where the force is applied to the movable spring 24 by the convex portion 20 can be further brought closer to the contact side, so that the peeling force can be increased to make it easier to peel the movable contact 21a from the fixed contact 22a. it can.

[Ninth Embodiment]
The electromagnetic relay 1 according to the present embodiment has substantially the same configuration as the electromagnetic relay 1 of the seventh and eighth embodiments.

  Here, the electromagnetic relay 1 of the present embodiment is mainly different from the electromagnetic relays 1 of the seventh and eighth embodiments in that the convex portion 20A is provided on the facing surface 24g of the movable spring (movable contact holding portion) 24. In other words, it protrudes in an arc shape from the facing surface 24g toward the fixed piece (fixed portion) 23 side.

  As shown in FIGS. 21A and 21B, the convex portion 20A is formed by bending a part of the movable spring 24. Even in this embodiment, the pair of opposed surfaces 24g and 23a is formed. Is provided at an end 23b opposite to the upper end (tip) 24f side of the connecting portion 24C.

  In the present embodiment, when the movable contact 21 a is peeled off, the convex portion 20 </ b> A comes into contact with the facing surface 23 a of the fixed piece 23, so that a force in the peeling direction is input to the movable spring 24.

  Also according to this embodiment described above, the same operations and effects as those of the first to eighth embodiments can be obtained. That is, when the contact where the movable contact 21a is separated from the fixed contact 22a is OFF, a force can be applied to the movable spring 24 in the direction of peeling the movable contact 21a from the fixed contact 22a by the convex portion 20A. Therefore, even when the movable contact 21a and the fixed contact 22a are welded by the arc, the movable contact 21a can be easily peeled off from the fixed contact 22a, and the reliability of the contact can be further improved.

  In this embodiment, the convex portion 20A is provided on the connecting portion 24C of the movable spring 24. However, the convex portion 20A is provided on the first holding portion 24A and the second holding portion 24B, and the fixed piece 23 is provided on the first holding portion 24B. Of course, it may be extended to a position overlapping with the holding portion 24A and the second holding portion 24B.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in each of the above embodiments, the movable contact portion 21 is attached to the armature 16 via the insulating portion 17, but the movable contact portion 21 is attached to the armature 16 without the insulating portion 17. It may be.

  In addition, in the electromagnetic relays 1A to 1E according to the second to sixth embodiments, the movable contact holding portion according to the third modification (a configuration in which the movable contact plate 25 as the movable contact holding portion is attached to the movable spring 24). Applicable. However, the present invention is not limited to this, and the movable contact holding portions (movable springs 24, 24A, 24B) according to the first embodiment and the first and second modifications may be applied.

  Further, the specifications (shape, size, layout, etc.) of the armature 16 and the hinge spring 18 and other details can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 10 Electromagnet block 16 Armature 20, 20A Convex part 21 Movable contact part 21a Movable contact (1st movable contact, 2nd movable contact)
22 fixed contact portion 22a fixed contact 24 movable spring (movable contact holding portion)
24A 1st holding | maintenance part 24B 2nd holding | maintenance part 24C Connection part 28 Slit

Claims (7)

An armature that swings when the electromagnet block is energized or de-energized;
A movable contact holding portion provided with a plurality of movable contacts, a movable contact portion attached to the armature and swinging with the swing of the armature;
A fixed contact portion having a fixed contact with which the movable contact is contacted and separated, and
The movable contact holding unit includes a first holding unit provided with a first movable contact, a second holding unit spaced apart from the first holding unit and provided with a second movable contact, and the first A connecting part that connects the holding part and the second holding part and is attached to the armature ,
The first holding part and the second holding part are each a connecting piece extending in one direction from the connecting part, and an intermediate portion extending from the end of the connecting piece in a direction intersecting the surface of the connecting piece. A piece, and an end piece extending from the end of the intermediate piece in the direction opposite to the one,
The end pieces of the first holding portion and the second holding portion are provided with the first movable contact and the second movable contact, respectively.
The connecting piece of the first holding part and the connecting piece of the second holding part are separated from each other at least on one side, and the first holding part is separated from the second holding part. An electromagnetic relay characterized by being configured to be relatively movable. Electromagnetic relay according to claim 1, characterized in that a slit for separating the said connecting piece with the previous SL the connecting piece of the first holding portion and the second holding portion.   The electromagnetic relay according to claim 1, wherein the movable contact holding part is made of an elastic body. The movable contact portion is disposed so as to overlap at least the connecting portion of the movable contact holding portion, and includes a fixed portion to which a distal end portion of the connecting portion is joined.
The electromagnetic relay according to any one of claims 1 to 3 , wherein a convex portion is provided on any one of opposing surfaces where the movable contact holding portion and the fixed portion overlap. 5. The electromagnetic relay according to claim 4 , wherein the convex portion is provided at an end portion of the facing surface opposite to a tip portion side of the connecting portion. Wherein the fixing unit, the electromagnetic relay according to claim 4 or 5, characterized in that it has extended to a position overlapping the first holding portion and the second holding portion of the movable contact holding portion. The electromagnetic relay according to any one of claims 4 to 6 , wherein the convex portion is formed in an arc shape.

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